package cn.xxm.utils;

import cn.xxm.config.GeneratorProperties;
import cn.xxm.entity.ColumnEntity;
import cn.xxm.entity.TableEntity;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.MapUtils;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.WordUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.springframework.core.env.Environment;
import org.springframework.util.ResourceUtils;

import java.io.*;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 代码生成器   工具类
 */
public class GenUtils {

    public static List<String> getTemplates(){
        List<String> templates = new ArrayList<String>();
        templates.add("template"+File.separator+"Entity.java.vm");
        templates.add("template"+File.separator+"Dao.java.vm");
        templates.add("template"+File.separator+"Dao.xml.vm");
        templates.add("template"+File.separator+"Service.java.vm");
        templates.add("template"+File.separator+"ServiceImpl.java.vm");
        templates.add("template"+File.separator+"Controller.java.vm");
        //templates.add("template/menu.sql.vm");

        //templates.add("template/index.vue.vm");
        //templates.add("template/add-or-update.vue.vm");

        return templates;
    }


    //public static void main(String[] args) throws Exception {
    //    //File file = ResourceUtils.getFile("classpath:otherTemplate/");
    //    Map<String, List<String>> map = new HashMap<>();
    //    map = getOtherTemplatesV2("classpath:otherTemplate/",map);
    //    System.out.println("map = " + map);
    //}
    public static Map<String,List<String>> getOtherTemplatesV2(String path,Map<String,List<String>> templateMap) throws Exception{
        File rootPath = ResourceUtils.getFile(path);
        if(rootPath.exists()){
            File[] files = rootPath.listFiles();
            for (File file : files) {
                if (file.isDirectory()) {
                    getOtherTemplatesV2(file.getAbsolutePath(),templateMap);
                } else {
                    String grandPaFilename = file.getParentFile().getParentFile().getName();
                    String parentFileName = file.getParentFile().getName();
                    String filename = file.getName();

                    String filePath = grandPaFilename +File.separator + parentFileName +File.separator+ filename;

                    List<String> curDirTemplateList = templateMap.get(parentFileName);
                    if(CollectionUtils.isEmpty(curDirTemplateList)){
                        curDirTemplateList = new ArrayList<>();
                    }
                    curDirTemplateList.add(filePath);
                    templateMap.put(parentFileName,curDirTemplateList);
                }
            }
        }else{
            System.out.println("path:" + path + "not exists");
        }
        return templateMap;
    }

    /**
     * 生成代码
     */
    public static void generatorCode(Map<String, String> table,
                                     List<Map<String, String>> columns, ZipOutputStream zip) {
        //配置信息
        Configuration config = getConfig();
        boolean hasBigDecimal = false;
        //表信息
        TableEntity tableEntity = new TableEntity();
        tableEntity.setTableName(table.get("tableName" ));
        tableEntity.setComments(table.get("tableComment" ));
        //表名转换成Java类名
        String className = tableToJava(tableEntity.getTableName(), config.getStringArray("tablePrefix"));
        tableEntity.setClassName(className);
        tableEntity.setClassname(StringUtils.uncapitalize(className));

        //列信息
        List<ColumnEntity> columsList = new ArrayList<>();
        for(Map<String, String> column : columns){
            ColumnEntity columnEntity = new ColumnEntity();
            columnEntity.setColumnName(column.get("columnName" ));
            columnEntity.setDataType(column.get("dataType" ));
            columnEntity.setComments(column.get("columnComment" ));
            columnEntity.setExtra(column.get("extra" ));

            //列名转换成Java属性名
            String attrName = columnToJava(columnEntity.getColumnName());
            columnEntity.setAttrName(attrName);
            columnEntity.setAttrname(StringUtils.uncapitalize(attrName));

            //列的数据类型，转换成Java类型
            String attrType = config.getString(columnEntity.getDataType(), "unknowType" );
            columnEntity.setAttrType(attrType);
            if (!hasBigDecimal && attrType.equals("BigDecimal" )) {
                hasBigDecimal = true;
            }
            //是否主键
            if ("PRI".equalsIgnoreCase(column.get("columnKey" )) && tableEntity.getPk() == null) {
                tableEntity.setPk(columnEntity);
            }

            columsList.add(columnEntity);
        }
        tableEntity.setColumns(columsList);

        //没主键，则第一个字段为主键
        if (tableEntity.getPk() == null) {
            tableEntity.setPk(tableEntity.getColumns().get(0));
        }

        //设置velocity资源加载器
        Properties prop = new Properties();
        prop.put("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader" );
        Velocity.init(prop);
        String mainPath = config.getString("mainPath" );
        mainPath = StringUtils.isBlank(mainPath) ? "io.renren" : mainPath;
        //封装模板数据
        Map<String, Object> map = new HashMap<>();
        map.put("tableName", tableEntity.getTableName());
        map.put("comments", tableEntity.getComments());
        map.put("pk", tableEntity.getPk());
        map.put("className", tableEntity.getClassName());
        map.put("classname", tableEntity.getClassname());
        map.put("pathName", tableEntity.getClassname().toLowerCase());
        map.put("columns", tableEntity.getColumns());
        map.put("hasBigDecimal", hasBigDecimal);
        map.put("mainPath", mainPath);
        map.put("package", config.getString("package" ));
        map.put("moduleName", config.getString("moduleName" ));
        map.put("ModuleName", config.getString("ModuleName" ));
        map.put("author", config.getString("author" ));
        map.put("email", config.getString("email" ));
        map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
        VelocityContext context = new VelocityContext(map);

        //获取模板列表
        List<String> templates = getTemplates();
        for (String template : templates) {
            //渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, "UTF-8" );
            tpl.merge(context, sw);

            try {
                //添加到zip
                zip.putNextEntry(new ZipEntry(getFileName(template, tableEntity.getClassName(), config.getString("package" ), config.getString("moduleName" ))));
                IOUtils.write(sw.toString(), zip, "UTF-8" );
                IOUtils.closeQuietly(sw);
                zip.closeEntry();
            } catch (IOException e) {
                throw new RRException("渲染模板失败，表名：" + tableEntity.getTableName(), e);
            }
        }
    }


    /**
     * 列名转换成Java属性名
     */
    public static String columnToJava(String columnName) {
        return WordUtils.capitalizeFully(columnName, new char[]{'_'}).replace("_", "" );
    }

    /**
     * 表名转换成Java类名
     */
    public static String tableToJava(String tableName, String[] tablePrefixArray) {
        if(null != tablePrefixArray && tablePrefixArray.length>0){
            for(String tablePrefix : tablePrefixArray){
                tableName = tableName.replace(tablePrefix, "");
            }
        }
        return columnToJava(tableName);
    }

    /**
     * 获取配置信息
     */
    public static Configuration getConfig() {
        try {
            Environment environment = ContextUtil.getEnvironment();
            String moduleName = environment.getProperty("moduleName");
            String ModuleName = new StringBuilder().append(moduleName.substring(0, 1).toUpperCase()).append(moduleName.substring(1)).toString();
            PropertiesConfiguration propertiesConfiguration = new PropertiesConfiguration("generator.properties");
            propertiesConfiguration.setProperty("ModuleName",ModuleName);
            return propertiesConfiguration;
        } catch (ConfigurationException e) {
            throw new RRException("获取配置文件失败，", e);
        }
    }

    //public static void main(String[] args) {
    //    Configuration config = getConfig();
    //    System.out.println("config = " + config);
    //}

    /**
     * 获取文件名
     */
    public static String getFileName(String template, String className, String packageName, String moduleName) {

        GeneratorProperties generatorProperties = ContextUtil.getBean(GeneratorProperties.class) ;

        String packagePath = "ff-"+ moduleName + File.separator +  "src" + File.separator + "main" + File.separator + "java" + File.separator;
        String resourcePath = "ff-"+ moduleName + File.separator +  "src" + File.separator + "main" + File.separator + "resources" + File.separator;
        String modulePath = "ff-"+ moduleName + File.separator ;

        int i = template.lastIndexOf(File.separator);
        if(i>=0 ){
            template = template.substring(i+1);
        }

        Environment env = ContextUtil.getEnvironment();
        String filePath = env.getProperty(template);

        filePath =  resolvePath(filePath,className,moduleName);

        return filePath;

        //String packagePath =  "main" + File.separator + "java" + File.separator;
        //if (StringUtils.isNotBlank(packageName)) {
        //    packagePath += packageName.replace(".", File.separator) + File.separator + moduleName + File.separator;
        //}
        //
        //if (template.contains("Entity.java.vm" )) {
        //    return packagePath + "entity" + File.separator + className + "Entity.java";
        //}
        //
        //if (template.contains("Dao.java.vm" )) {
        //    return packagePath + "dao" + File.separator + className + "Dao.java";
        //}
        //
        //if (template.contains("Service.java.vm" )) {
        //    return packagePath + "service" + File.separator + className + "Service.java";
        //}
        //
        //if (template.contains("ServiceImpl.java.vm" )) {
        //    return packagePath + "service" + File.separator + "impl" + File.separator + className + "ServiceImpl.java";
        //}
        //
        //if (template.contains("Controller.java.vm" )) {
        //    return packagePath + "controller" + File.separator + className + "Controller.java";
        //}
        //
        //if (template.contains("Dao.xml.vm" )) {
        //    return resourcePath + "mapper" + File.separator + moduleName + File.separator + className + "Dao.xml";
        //}
        //
        //if (template.contains("menu.sql.vm" )) {
        //    return className.toLowerCase() + "_menu.sql";
        //}
        //
        //if (template.contains("index.vue.vm" )) {
        //    return resourcePath + "src" + File.separator + "views" + File.separator + "modules" +
        //            File.separator + moduleName + File.separator + className.toLowerCase() + ".vue";
        //}
        //
        //if (template.contains("add-or-update.vue.vm" )) {
        //    return resourcePath + "src" + File.separator + "views" + File.separator + "modules" +
        //            File.separator + moduleName + File.separator + className.toLowerCase() + "-add-or-update.vue";
        //}
        //
        //if (template.contains("PageConstant.java.vm" )) {
        //    return packagePath + "common" + File.separator + className + "PageConstant.java";
        //}
        //
        //if (template.contains("PageUtils.java.vm" )) {
        //    return packagePath + "common" + File.separator + className + "PageUtils.java";
        //}
        //
        //
        //if (template.contains("Query.java.vm" )) {
        //    return packagePath + "common" + File.separator + className + "Query.java";
        //}
        //
        //if (template.contains("R.java.vm" )) {
        //    return packagePath + "common" + File.separator + className + "R.java";
        //}
        //
        //if (template.contains("SQLFilter.java.vm" )) {
        //    return packagePath + "common" + File.separator + className + "SQLFilter.java";
        //}
        //
        //if (template.contains("MainApplication.java.vm" )) {
        //    String mainClassName = "Main";
        //    if(StringUtils.isNotBlank(moduleName)){
        //        if(moduleName.length()>1){
        //            mainClassName = new StringBuilder().append(moduleName.substring(0, 1).toUpperCase()).append(moduleName.substring(1)).toString();
        //        }else {
        //            mainClassName = moduleName.toUpperCase();
        //        }
        //    }
        //    return packagePath + mainClassName+"Application.java";
        //}
        //
        //
        //if (template.contains("application.properties.vm" )) {
        //    return resourcePath + "application.properties";
        //}
        //
        //if (template.contains("application-dev.properties.vm" )) {
        //    return resourcePath + "application-dev.properties";
        //}
        //
        //if (template.contains("Pom.xml.vm" )) {
        //    return modulePath + "pom.xml";
        //}
        //return null;
    }

    private static String resolvePath(String filePath, String className,String moduleName) {
        String realPath = filePath;
        StringBuilder sb = new StringBuilder();
        if(StringUtils.isNotBlank(filePath) && filePath.contains("#{className}")){
            realPath = filePath.substring(0, filePath.indexOf("#{")) + className + filePath.substring(filePath.indexOf("}") + 1);
        }else if(StringUtils.isNotBlank(filePath) && filePath.contains("Application")){
            String preClassName = moduleName + "Application";
            String fixMainClassName = moduleName + "Application";
            if(moduleName.length()>1){
                fixMainClassName = new StringBuilder().append(fixMainClassName.substring(0, 1).toUpperCase()).append(fixMainClassName.substring(1)).toString();
            }else {
                fixMainClassName = moduleName.toUpperCase() +"Application";
            }
            realPath = filePath.replace(preClassName, fixMainClassName);
        }

        int lastIndex = realPath.lastIndexOf(".");
        realPath.substring(0,lastIndex);
        realPath = realPath.substring(0,lastIndex).replace(".",File.separator) + realPath.substring(lastIndex);
        return realPath;
    }


    public static void generatorOtherCode(ZipOutputStream zip) {

        //配置信息
        Configuration config = getConfig();

        //设置velocity资源加载器
        Properties prop = new Properties();
        prop.put("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader" );
        Velocity.init(prop);
        String mainPath = config.getString("mainPath" );
        mainPath = StringUtils.isBlank(mainPath) ? "io.renren" : mainPath;
        //封装模板数据
        Map<String, Object> map = new HashMap<>();

        map.put("mainPath", mainPath);
        map.put("package", config.getString("package" ));
        map.put("moduleName", config.getString("moduleName" ));
        map.put("ModuleName", config.getString("ModuleName" ));
        map.put("author", config.getString("author" ));
        map.put("email", config.getString("email" ));
        map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
        map.put("serverPort", config.getString("serverPort" ));
        map.put("dbUrl", config.getString("dbUrl" ));
        map.put("dbUserName", config.getString("dbUserName" ));
        map.put("dbPassword", config.getString("dbPassword" ));
        map.put("dbDriver", config.getString("dbDriver" ));

        VelocityContext context = new VelocityContext(map);

        //获取其他模板列表

        Map<String, List<String>> otherTemplateMap = new HashMap<>();
        try {
            otherTemplateMap = getOtherTemplatesV2("classpath:otherTemplate/", otherTemplateMap);
        } catch (Exception e) {
            throw new RRException("获取other模板失败，classpath:otherTemplate/", e);
        }

        if(MapUtils.isNotEmpty(otherTemplateMap)){
            for (List<String> otherTempList : otherTemplateMap.values()) {
                dealOtherTemplate(zip, config, context, otherTempList);
            }
        }


    }

    private static void dealOtherTemplate(ZipOutputStream zip, Configuration config, VelocityContext context, List<String> templates) {
        for (String template : templates) {
            //渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, "UTF-8" );
            tpl.merge(context, sw);

            try {
                //添加到zip
                zip.putNextEntry(new ZipEntry(getFileName(template, "", config.getString("package" ), config.getString("moduleName" ))));
                IOUtils.write(sw.toString(), zip, "UTF-8" );
                IOUtils.closeQuietly(sw);
                zip.closeEntry();
            } catch (IOException e) {
                throw new RRException("渲染other模板失败，template:" + template, e);
            }
        }
    }
}
